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Endothelial cell function in patients with Down's syndrome.

Maurizio Cappelli-Bigazzi1, Giuseppe Santoro, Carmine Battaglia

  • 1Division of Pediatric Cardiology, 2nd University of Medicine, Monaldi Hospital, Naples, Italy. mcappelli@tin.it

The American Journal of Cardiology
|July 28, 2004
PubMed
Summary

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Patients with Down syndrome exhibit impaired vascular endothelial function, leading to increased pulmonary vascular reactivity. While vitamin C showed minimal improvement, this suggests a potential link between oxidative stress and cardiovascular issues in Down syndrome.

Area of Science:

  • Cardiovascular Science
  • Genetics
  • Physiology

Background:

  • Down syndrome is associated with increased pulmonary vascular reactivity.
  • Impaired vascular endothelial function and oxidative stress are potential contributing factors.

Purpose of the Study:

  • To investigate endothelial function in patients with Down syndrome.
  • To assess the impact of the antioxidant vitamin C on vasodilation.

Main Methods:

  • Studied endothelium-dependent and -independent vasodilation in 8 Down syndrome patients and 9 euploid controls.
  • Measured brachial flow velocity using an intravascular Doppler flow wire.

Main Results:

  • Patients with Down syndrome demonstrated significantly impaired endothelial function compared to controls.

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  • Vitamin C administration resulted in a slight, non-significant improvement in endothelium-dependent vasodilation.

    • Conclusions:

    • Down syndrome is linked to impaired vascular endothelial function.
    • Oxidative stress may play a role, but vitamin C's effect is limited, suggesting complex mechanisms.